suryahanuma (1/29/2016)
I am 100% sure it would not go beyond C usually,with 3 exemptions if all are utilized it will go F. SO we do not have to think until Z.
The real problem is that the data is denormalized. The letter should be stored in a different column so that you'll be able to do other analysis you don't yet know about without having to write slow moving totally non-SARGable queries.
--Jeff Moden
Change is inevitable... Change for the better is not.